scholarly journals Holographic Performance of Azo-Carbazole Dye-Doped UP Resin Films Using a Dyeing Process

Materials ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 945
Author(s):  
Kenji Kinashi ◽  
Isana Ozeki ◽  
Ikumi Nakanishi ◽  
Wataru Sakai ◽  
Naoto Tsutsumi
Keyword(s):  
Aqueous Solution ◽  
Unsaturated Polyester ◽  
Optical Diffraction ◽  
Optical Transparency ◽  
Crosslinking Reaction ◽  
Dyeing Process ◽  
Dynamic Holography ◽  
Uniform Dispersion ◽  
Resin Film ◽  
Dyeing Method

For the practical application of dynamic holography using updatable dyed materials, optical transparency and an enlarged sample size with a uniform dispersion of the dye and no air bubbles are crucial. The holographic films were prepared by applying a dyeing method comprising application, curing, dyeing, and washing to an unsaturated polyester (UP) resin film. The unsaturated polyester (UP) resin film with high optical transparency was dyed with a 3-[(4-cyanophenyl)azo]-9H-carbazole-9-ethanol (CACzE) (azo-carbazole) dye via the surfactant, polyoxyethylene (5) docosyl ether, in an aqueous solution. The amount of dye uptake obtained via the dyeing process ranged from 0.49 to 6.75 wt.%. The dye concentration in the UP resin was proportional to the dye concentration in the aqueous solution and the immersion time. The UP resin film with 3.65 wt.% dye exhibited the optical diffraction property η1 of 0.23% with a response time τ of 5.9 s and a decay time of 3.6 s. The spectroscopic evaluation of the UP resin film crosslinking reaction and the dyeing state in the UP resin film are discussed. Furthermore, as an example of its functionality, the dynamic holographic properties of the dye-doped UP resin film are discussed.

A novel functional disperse dye doped with graphene oxide for improving antistatic properties of polyester fabric using one-bath dyeing method

2019 ◽  
Vol 90 (5-6) ◽  
pp. 655-665 ◽  
Author(s):  
Lihua Fan ◽  
Yongsong Tan ◽  
Jeremiah Amesimeku ◽  
Yunjie Yin ◽  
Chaoxia Wang
Keyword(s):  
Graphene Oxide ◽  
Polyester Fabric ◽  
Disperse Dye ◽  
Reduction Time ◽  
Dyeing Process ◽  
Functional Dyes ◽  
One Bath Dyeing ◽  
Dyeing Method ◽  
Dyed Fabric ◽  
Microscopic Morphology

A novel functional disperse dye doped with graphene oxide for antistatic properties of polyester fabric was achieved, which means that the dyeing and antistatic finishing can be simultaneously obtained by a one-bath method. Functional dyes were used to dye polyester fabric by a high-temperature, high-pressure dyeing method. The surface microscopic morphology of the dyed polyester fabric, and the dispersion properties of the disperse dye, graphene oxide, and the functional disperse dye, were characterized by scanning electron microscopy. The effects of the dyeing temperature on the particle sizes of three dyeing liquors were explored; this revealed that the temperature of the dyeing process had no effect on particle size. The dosage and reduction time of graphene oxide were investigated. The surface electrical resistance of the dyed fabric, 9.8 × 106 Ω, obtained at a condition of 2% (o.m.f) graphene oxide with a reduction time of 30 min, achieved A-grade antistatic standard. Furthermore, the rubbing and washing fastness of the treated fabric were 4- and 4 ∼ 5 grades, respectively. This preparation of the functional disperse dye provides a possibility in one-bath dyeing and antistatic finishing of polyester fabric.

Biosorption of hexavalent chromium from aqueous solution by polyethyleneimine-modified ultrasonic-assisted acid hydrochar from Sargassum horneri

2020 ◽  
Vol 81 (6) ◽  
pp. 1114-1129 ◽  
Author(s):  
Jun Wang ◽  
Qinglong Xie ◽  
Ao Li ◽  
Xuejun Liu ◽  
Fengwen Yu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photoelectron Spectroscopy ◽  
Batch Adsorption ◽  
Crosslinking Reaction ◽  
Order Kinetic ◽  
Adsorption Capacities ◽  
Initial Ph ◽  
Ultrasonic Assisted ◽  
Order Kinetic Model ◽  
Pseudo Second Order

Abstract In this study, an efficient route to synthesizing polyethyleneimine-modified ultrasonic-assisted acid hydrochar (PEI-USAH) is developed and reported. Ultrasonic irradiation technique was used as surface modification method to shorten the crosslinking reaction for hydrochar and polyethyleneimine (PEI). The PEI-USAH showed an excellent adsorption capacity for Cr(VI) from aqueous solution. The physicochemical properties of this PEI-modified adsorbent were comparatively characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller analysis and CNHS analysis. The effects of contact time, initial pH, and biosorbent dose on adsorption capacities were investigated. The batch adsorption experiments showed that PEI-USAH possessed the maximum adsorption capacities of 94.38 mg/g and 330.84 mg/g for initial Cr(VI) concentration of 100 mg/L and 500 mg/L, respectively. Furthermore, this adsorption process could be fitted to Langmuir adsorption and described by the pseudo second order kinetic model. Based on the above findings, PEI-USAH could be used as a potential adsorbent for removal of Cr(VI) from wastewater.

scholarly journals Deformability in Unsaturated Polyester Resin-Based Concrete: Effects of the Concentration of Shrinkage-Reducing Agent and Type of Filler

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 727 ◽  
Author(s):  
Jung Heum Yeon ◽  
Hee Jun Lee ◽  
Jaeheum Yeon
Keyword(s):  
Thermal Expansion ◽  
Modulus Of Elasticity ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Compressive Strain ◽  
Spherical Particles ◽  
Polymer Concrete ◽  
Mix Proportion ◽  
Uniform Dispersion ◽  
Shrinkage Reducing Agent

In this study, the effects of shrinkage reduction agent (SRA) content and filler type on the deformability characteristics of unsaturated polyester (UP) resin-based polymer concrete were experimentally investigated. Specifically, the setting shrinkage, thermal expansion, maximum compressive strain and the modulus of elasticity of UP polymer concrete were all analyzed. Setting shrinkage was found to be influenced by the UP resin, the SRA and filler. The thermal expansion, maximum compressive strain and modulus of elasticity were also affected by the aggregate. The effect of SRA content on deformability was found to be greater than that of the filler type. To put UP polymer concrete to efficient use, it is essential to secure proper deformability according to the intended purpose. At that time, it is desirable that the deformation characteristics resulting from the SRA content and filler type sufficiently reflect when the mix proportion is determined. The effects of filler type on the deformability of UP polymer concrete are such that: A uniform dispersion of filler particles impacts the setting shrinkage; the thermal expansion is influenced by the filler’s various thermal expansion properties; the compressive strain is related to the nature of the small spherical particles that tend to fill porosity, producing better packing of the aggregate materials; and the modulus of elasticity is influenced by the density, which is related to the strength of the filler. However, additional in-depth studies are required on all of these elements.

Adsorption of Benzene and Aniline Using a Novel Hypercrosslinked Polymeric Adsorbent Modified by Phenolic Hydroxyl Group

2013 ◽  
Vol 575-576 ◽  
pp. 130-134
Author(s):  
Xin Hua Yuan ◽  
Wen Hua Guo ◽  
Yan Lei ◽  
Yong Qiang Liu ◽  
Ji Ye Wu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Bond ◽  
Chemical Interaction ◽  
Liquid Paraffin ◽  
Phenolic Hydroxyl ◽  
Hydroxyl Group ◽  
Physical Interaction ◽  
Crosslinking Reaction ◽  
Polymeric Adsorbent ◽  
Hypercrosslinked Polymeric Adsorbent

Using gelatin as dispersant, liquid paraffin as porogen, novel hypercrosslinked polymeric adsorbents of LM-5 and LM-6 were prepared by post-crosslinking reaction with phenol and 2-naphthol, respectively. Bromoethane was used as crosslinking reagent to substitute poisonous organic compound of chloromethyl methylether. 2-Naphthol was used in the post-crosslinking reaction to enhance phenolic hydroxyl group content. The experiments of selective adsorbing aniline on resins in mixture solution, which consisting of benzene and aniline, show that the adsorption of aniline and benzene on LM-6 in aqueous solution are mainly pushed by physical interaction. The adsorption of aniline is also partly pushed by chemical interaction, and the adsorptive enthalpy illuminates that there exists hydrogen-bonding. Owning to the hydrogen-bond, the adsorption capacity of aniline on LM-6 is markedly higher than that of benzene.

Dyeing of Pearl Fiber by Walnut Peel Dye

2012 ◽  
Vol 441 ◽  
pp. 66-71 ◽  
Author(s):  
Chao Ping Dong ◽  
Jie Dong ◽  
Jian Ming Xia
Keyword(s):  
Ferrous Sulfate ◽  
Evaluation Index ◽  
Single Factor ◽  
Dyeing Process ◽  
Ammonium Ferrous Sulfate ◽  
Liquor Ratio ◽  
Orthogonal Experiments ◽  
Dyeing Method ◽  
Pearl Fiber ◽  
Peel Extract

This paper studied the metachrome process of an optimal dyeing method by comparing the color and fastness of walnut peel extract applied on the pearl fiber with ammonium ferrous sulfate as mordent. In addition, the paper also ascertained the reasonable dyeing process, that is, pH 9, walnut peel extract (the dye) dosage 200 ml/L, mordant (ammonium ferrous sulfate) 2.5 g/L, temperature 80 °C, time 60 min and liquor ratio 1:30, through analysis on single-factor experiments and orthogonal experiments by taking K/S as an evaluation index for the dyeing effect. The results showed that a better effect is achievable by dyeing the pearl fiber with walnut peel dye through the metachrome process.

scholarly journals Thermal, Morphological Analysis of Epoxy/Unsaturated Polyester Blended Nanocomposite with Wollastonite Powder as a Particulate

2019 ◽  
Vol 31 (9) ◽  
pp. 2069-2072
Author(s):  
A. Damodara Reddy ◽  
M.L.S. Deva Kumar
Keyword(s):  
Morphological Analysis ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Morphological Structure ◽  
Decomposition Temperature ◽  
Scanning Calorimetry ◽  
Research Article ◽  
Uniform Dispersion ◽  
Wide Range ◽  
Microscopy Images

In the proposed research article, polymer nanocomposites on the basis of thermoset polymer resultant blends (epoxy/polyester) having wollastonite powder are prepared by high shear mixer (mechanical), followed by an ultra-sonicator for uniform dispersion of wollastonite particulates in the final blend matrix. Wide range percentages of modified wollastonite nano-particulates with 0, 1, 2, 3, 4 and 5 wt. % were incorporated into the epoxy/polyester blend matrix in order to evaluate the effect of nanofillers on nanophase morphological structure and to study material properties. Various thermal parameters of the nanocomposite were evaluated using thermogravimetric analysis and differential scanning calorimetry techniques. Further, the scanning electron microscopy images have been employed to know fractured surfaces of the titled compound. From the experimental data it was found that uniform miscibility of epoxy/polyester blend mix and homogenous dispersion of wollastonite nano particulates in the blend matrix was noticed. From the TGA studies, 8 % weight loss and 4 °C rise in decomposition temperature was observed with addition of 5 wt. % wollastonite when compared with the 0 wt. % wollastonite combination of epoxy/unsaturated polyester resin blend. DSC results further revealed that the modified wollastonite nanoparticles is major responsible for the glass transition temperature (Tg) of the nanocomposites.

A natural dye extract from lotus seedpod for dyeability and functional property of tussah silk fabric

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Hualing He ◽  
Yushu Wang ◽  
Jinru Liu ◽  
Ning Zhou ◽  
Yuhang Zhao ◽  
...  
Keyword(s):  
Uv Protection ◽  
Cross Linking ◽  
Silk Fabric ◽  
Dye Molecules ◽  
Natural Pigment ◽  
Content Type ◽  
Dyeing Process ◽  
Dyeing Method ◽  
Lotus Seedpod ◽  
Practical Implications

Purpose This paper aims to investigate the dyeability of tussah silk fabric with lotus seedpod extract as the source of nontoxic and eco-friendly dyestuffs and functional agent. Design/methodology/approach Mordant free dyeing method was carried out using citric acid (CA) as the cross-linking agent to link the fibre and dye molecules. First, the natural pigment of oligomeric procyanidins was extracted from the lotus seedpod and then used to dye the tussah silk fabric. After the dyeing process, the dyed samples were treated with CA solution under different concentrations to improve the colour fastness. Findings The tussah silk fabric was successfully coloured in reddish brown through the dyeing process and charactered by using Fourier-transform infrared spectroscopy spectrometer. Moreover, lotus seedpod extract could impart excellent UV protection ability to the dyed samples, and UPF values reached up to 2000. CA dosage influenced the colour characteristics, UV protection and anti-wrinkling performance. The optimum dosage of CA was 7% (Wt.%). In addition, dyed silk fabric showed good antibacterial activity and the calculated bacteriostatic rate against Escherichia coli and Staphylococcus aureus were 83.27 and 60.2%, respectively. Practical implications This bio-dyeing strategy provided a simple and effective method for sustainable tussah silk fabric dyeing process. Originality/value This paper provides a novel dyeing strategy for mordant free dyeing and functionalization of tussah silk fabric, with lotus seedpod extract as natural pigment and CA as cross-linking agent to link the fibre and dye molecules.

Oligomer-in-water emulsion based waterborne UV-curable paints for cotton printing

2014 ◽  
Vol 43 (5) ◽  
pp. 293-298 ◽  
Author(s):  
Tao Zhang ◽  
Kairui Zhang ◽  
Tao Li ◽  
Chaoxia Wang ◽  
Fan Yang
Keyword(s):  
Aqueous Solution ◽  
Droplet Size ◽  
Emulsion Stability ◽  
Sodium Dodecyl ◽  
Water Emulsion ◽  
Uv Curable ◽  
Content Type ◽  
Subsequent Decrease ◽  
Uniform Dispersion ◽  
The Stability

Purpose – The purpose of this paper is to prepare waterborne UV-curable pigment pastes for cotton fabric printing. Design/methodology/approach – O/W (oligomer-in-water) emulsions of polyurethane acrylate (PUA) oligomer in sodium dodecyl benzene sulphonate (SDBS) aqueous solution were prepared by ultrasonic emulsification method. Findings – The present work studies various factors affecting the stability and droplet size of the O/W emulsion stabilised by SDBS. The optimal emulsifier concentration was 2.5 per cent, under which condition the stability of the emulsion increased as the emulsifier content increased, with a subsequent decrease in the droplet size of the emulsion, while above which emulsion agglomeration occurred. Increasing the power and duration of ultrasonic dispersion resulted in increased emulsion stability and decreased droplet size, while increases in the oligomer content reduced the emulsion stability. Darocure 1173 mixed with PUA and then emulsified in the SDBS aqueous solution guaranteed uniform dispersion of the photoinitiator, resulting in faster curing speed. Originality/value – This paper presents a new method for making waterborne externally emulsified oligomers for UV curing, and finds that it is easy to convert the existing oligomers into waterborne equivalents by this method. Cotton fabrics printed with the oligomer emulsion based pastes were found to have good colour strength and crockfastness.

scholarly journals Investigation on Moisture Damage Prevention of a Spherical Hinge Structure of a Swivel Bridge

Coatings ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 955
Author(s):  
Wei Guo ◽  
Xuedong Guo ◽  
Ziwen Wang ◽  
Zhun Li
Keyword(s):  
Performance Test ◽  
Unsaturated Polyester ◽  
Moisture Damage ◽  
Bending Test ◽  
Optimal Dosage ◽  
Test Results ◽  
Uniform Dispersion ◽  
Spherical Hinge ◽  
The Impact ◽  
Damage Prevention

As a key component of a swivel bridge, the spherical hinge is a steel-concrete structure, which is susceptible to moisture damage during waiting time. In this paper, spherical hinge moisture damage prevention is investigated comprehensively from two aspects of impermeable concrete and steel-concrete interface waterproof coating. Three impermeable concretes were prepared and tested by the compressive strength test, splitting tensile test, four-point bending test and the impermeability test. The test results illustrated that addition of cementitious capillary crystalline active masterbatch (CCCAM) and polypropylene fiber (PP) could improve the toughness and brittleness of concrete. The addition of CCCAM was an effective technique for improving the permeability of concrete. However, the incorporation of PP and CCCAM at the same time cannot improve the impermeability of concrete. This may be because the chaotic support structure formed by PP prevents the infiltration and uniform dispersion of CCCAM. A waterproof coating consolidation performance test was proposed to quantify the interface bond strength of waterproof coatings and assess the impact of temperature, moisture and freeze-thawing cycles on consolidation performance of waterproof coatings. The test results showed that temperature had a significant effect on the interface consolidation property of waterproof coatings and the optimal dosage of SBS modified asphalt (SBS), polyurethane (PLT) and unsaturated polyester resin (UPLS) waterproof coating is 1.18kg/m2, 0.95kg/m2 and 1.15kg/m2, respectively. Moreover, it was found that PLS waterproof coating maintained excellent properties in complex environment. This is because PLS has excellent shear strength and rubber characteristics, and it can form a hard–soft–hard transition layer between the concrete and steel, reducing the impact of environmental factors.

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